drivers/media/usb/b2c2/flexcop-usb.c - kernel/lockdown - Git at Google

 /*
  * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
  * flexcop-usb.c - covers the USB part
  * see flexcop.c for copyright information
  */
 #define FC_LOG_PREFIX "flexcop_usb"
 #include "flexcop-usb.h"
 #include "flexcop-common.h"

 /* Version information */
 #define DRIVER_VERSION "0.1"
 #define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV USB Driver"
 #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>"

 /* debug */
 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
 #define dprintk(level,args...) \
 	do { if ((debug & level)) printk(args); } while (0)

 #define debug_dump(b, l, method) do {\
 	int i; \
 	for (i = 0; i < l; i++) \
 		method("%02x ", b[i]); \
 	method("\n"); \
 } while (0)

 #define DEBSTATUS ""
 #else
 #define dprintk(level, args...)
 #define debug_dump(b, l, method)
 #define DEBSTATUS " (debugging is not enabled)"
 #endif

 static int debug;
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "set debugging level (1=info,ts=2,"
 		"ctrl=4,i2c=8,v8mem=16 (or-able))." DEBSTATUS);
 #undef DEBSTATUS

 #define deb_info(args...) dprintk(0x01, args)
 #define deb_ts(args...) dprintk(0x02, args)
 #define deb_ctrl(args...) dprintk(0x04, args)
 #define deb_i2c(args...) dprintk(0x08, args)
 #define deb_v8(args...) dprintk(0x10, args)

 /* JLP 111700: we will include the 1 bit gap between the upper and lower 3 bits
  * in the IBI address, to make the V8 code simpler.
  * PCI ADDRESS FORMAT: 0x71C -> 0000 0111 0001 1100 (the six bits used)
  *                  in general: 0000 0HHH 000L LL00
  * IBI ADDRESS FORMAT:                    RHHH BLLL
  *
  * where R is the read(1)/write(0) bit, B is the busy bit
  * and HHH and LLL are the two sets of three bits from the PCI address.
  */
 #define B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(usPCI) (u8) \
 	(((usPCI >> 2) & 0x07) + ((usPCI >> 4) & 0x70))
 #define B2C2_FLEX_INTERNALADDR_TO_PCIOFFSET(ucAddr) (u16) \
 	(((ucAddr & 0x07) << 2) + ((ucAddr & 0x70) << 4))

 /*
  * DKT 020228
  * - forget about this VENDOR_BUFFER_SIZE, read and write register
  *   deal with DWORD or 4 bytes, that should be should from now on
  * - from now on, we don't support anything older than firm 1.00
  *   I eliminated the write register as a 2 trip of writing hi word and lo word
  *   and force this to write only 4 bytes at a time.
  *   NOTE: this should work with all the firmware from 1.00 and newer
  */
 static int flexcop_usb_readwrite_dw(struct flexcop_device *fc, u16 wRegOffsPCI, u32 *val, u8 read)
 {
 	struct flexcop_usb *fc_usb = fc->bus_specific;
 	u8 request = read ? B2C2_USB_READ_REG : B2C2_USB_WRITE_REG;
 	u8 request_type = (read ? USB_DIR_IN : USB_DIR_OUT) | USB_TYPE_VENDOR;
 	u8 wAddress = B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(wRegOffsPCI) |
 		(read ? 0x80 : 0);

 	int len = usb_control_msg(fc_usb->udev,
 			read ? B2C2_USB_CTRL_PIPE_IN : B2C2_USB_CTRL_PIPE_OUT,
 			request,
 			request_type, /* 0xc0 read or 0x40 write */
 			wAddress,
 			0,
 			val,
 			sizeof(u32),
 			B2C2_WAIT_FOR_OPERATION_RDW * HZ);

 	if (len != sizeof(u32)) {
 		err("error while %s dword from %d (%d).", read ? "reading" :
 				"writing", wAddress, wRegOffsPCI);
 		return -EIO;
 	}
 	return 0;
 }
 /*
  * DKT 010817 - add support for V8 memory read/write and flash update
  */
 static int flexcop_usb_v8_memory_req(struct flexcop_usb *fc_usb,
 		flexcop_usb_request_t req, u8 page, u16 wAddress,
 		u8 *pbBuffer, u32 buflen)
 {
 	u8 request_type = USB_TYPE_VENDOR;
 	u16 wIndex;
 	int nWaitTime, pipe, len;
 	wIndex = page << 8;

 	switch (req) {
 	case B2C2_USB_READ_V8_MEM:
 		nWaitTime = B2C2_WAIT_FOR_OPERATION_V8READ;
 		request_type |= USB_DIR_IN;
 		pipe = B2C2_USB_CTRL_PIPE_IN;
 		break;
 	case B2C2_USB_WRITE_V8_MEM:
 		wIndex |= pbBuffer[0];
 		request_type |= USB_DIR_OUT;
 		nWaitTime = B2C2_WAIT_FOR_OPERATION_V8WRITE;
 		pipe = B2C2_USB_CTRL_PIPE_OUT;
 		break;
 	case B2C2_USB_FLASH_BLOCK:
 		request_type |= USB_DIR_OUT;
 		nWaitTime = B2C2_WAIT_FOR_OPERATION_V8FLASH;
 		pipe = B2C2_USB_CTRL_PIPE_OUT;
 		break;
 	default:
 		deb_info("unsupported request for v8_mem_req %x.\n", req);
 		return -EINVAL;
 	}
 	deb_v8("v8mem: %02x %02x %04x %04x, len: %d\n", request_type, req,
 			wAddress, wIndex, buflen);

 	len = usb_control_msg(fc_usb->udev, pipe,
 			req,
 			request_type,
 			wAddress,
 			wIndex,
 			pbBuffer,
 			buflen,
 			nWaitTime * HZ);

 	debug_dump(pbBuffer, len, deb_v8);
 	return len == buflen ? 0 : -EIO;
 }

 #define bytes_left_to_read_on_page(paddr,buflen) \
 	((V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)) > buflen \
 	 ? buflen : (V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)))

 static int flexcop_usb_memory_req(struct flexcop_usb *fc_usb,
 		flexcop_usb_request_t req, flexcop_usb_mem_page_t page_start,
 		u32 addr, int extended, u8 *buf, u32 len)
 {
 	int i,ret = 0;
 	u16 wMax;
 	u32 pagechunk = 0;

 	switch(req) {
 	case B2C2_USB_READ_V8_MEM:
 		wMax = USB_MEM_READ_MAX;
 		break;
 	case B2C2_USB_WRITE_V8_MEM:
 		wMax = USB_MEM_WRITE_MAX;
 		break;
 	case B2C2_USB_FLASH_BLOCK:
 		wMax = USB_FLASH_MAX;
 		break;
 	default:
 		return -EINVAL;
 		break;
 	}
 	for (i = 0; i < len;) {
 		pagechunk =
 			wMax < bytes_left_to_read_on_page(addr, len) ?
 				wMax :
 				bytes_left_to_read_on_page(addr, len);
 		deb_info("%x\n",
 			(addr & V8_MEMORY_PAGE_MASK) |
 				(V8_MEMORY_EXTENDED*extended));

 		ret = flexcop_usb_v8_memory_req(fc_usb, req,
 			page_start + (addr / V8_MEMORY_PAGE_SIZE),
 			(addr & V8_MEMORY_PAGE_MASK) |
 				(V8_MEMORY_EXTENDED*extended),
 			&buf[i], pagechunk);

 		if (ret < 0)
 			return ret;
 		addr += pagechunk;
 		len -= pagechunk;
 	}
 	return 0;
 }

 static int flexcop_usb_get_mac_addr(struct flexcop_device *fc, int extended)
 {
 	return flexcop_usb_memory_req(fc->bus_specific, B2C2_USB_READ_V8_MEM,
 		V8_MEMORY_PAGE_FLASH, 0x1f010, 1,
 		fc->dvb_adapter.proposed_mac, 6);
 }

 #if 0
 static int flexcop_usb_utility_req(struct flexcop_usb *fc_usb, int set,
 		flexcop_usb_utility_function_t func, u8 extra, u16 wIndex,
 		u16 buflen, u8 *pvBuffer)
 {
 	u16 wValue;
 	u8 request_type = (set ? USB_DIR_OUT : USB_DIR_IN) | USB_TYPE_VENDOR;
 	int nWaitTime = 2,
 	    pipe = set ? B2C2_USB_CTRL_PIPE_OUT : B2C2_USB_CTRL_PIPE_IN, len;
 	wValue = (func << 8) | extra;

 	len = usb_control_msg(fc_usb->udev,pipe,
 			B2C2_USB_UTILITY,
 			request_type,
 			wValue,
 			wIndex,
 			pvBuffer,
 			buflen,
 			nWaitTime * HZ);
 	return len == buflen ? 0 : -EIO;
 }
 #endif

 /* usb i2c stuff */
 static int flexcop_usb_i2c_req(struct flexcop_i2c_adapter *i2c,
 		flexcop_usb_request_t req, flexcop_usb_i2c_function_t func,
 		u8 chipaddr, u8 addr, u8 *buf, u8 buflen)
 {
 	struct flexcop_usb *fc_usb = i2c->fc->bus_specific;
 	u16 wValue, wIndex;
 	int nWaitTime,pipe,len;
 	u8 request_type = USB_TYPE_VENDOR;

 	switch (func) {
 	case USB_FUNC_I2C_WRITE:
 	case USB_FUNC_I2C_MULTIWRITE:
 	case USB_FUNC_I2C_REPEATWRITE:
 		/* DKT 020208 - add this to support special case of DiSEqC */
 	case USB_FUNC_I2C_CHECKWRITE:
 		pipe = B2C2_USB_CTRL_PIPE_OUT;
 		nWaitTime = 2;
 		request_type |= USB_DIR_OUT;
 		break;
 	case USB_FUNC_I2C_READ:
 	case USB_FUNC_I2C_REPEATREAD:
 		pipe = B2C2_USB_CTRL_PIPE_IN;
 		nWaitTime = 2;
 		request_type |= USB_DIR_IN;
 		break;
 	default:
 		deb_info("unsupported function for i2c_req %x\n", func);
 		return -EINVAL;
 	}
 	wValue = (func << 8) | (i2c->port << 4);
 	wIndex = (chipaddr << 8 ) | addr;

 	deb_i2c("i2c %2d: %02x %02x %02x %02x %02x %02x\n",
 			func, request_type, req,
 			wValue & 0xff, wValue >> 8,
 			wIndex & 0xff, wIndex >> 8);

 	len = usb_control_msg(fc_usb->udev,pipe,
 			req,
 			request_type,
 			wValue,
 			wIndex,
 			buf,
 			buflen,
 			nWaitTime * HZ);
 	return len == buflen ? 0 : -EREMOTEIO;
 }

 /* actual bus specific access functions,
    make sure prototype are/will be equal to pci */
 static flexcop_ibi_value flexcop_usb_read_ibi_reg(struct flexcop_device *fc,
 	flexcop_ibi_register reg)
 {
 	flexcop_ibi_value val;
 	val.raw = 0;
 	flexcop_usb_readwrite_dw(fc, reg, &val.raw, 1);
 	return val;
 }

 static int flexcop_usb_write_ibi_reg(struct flexcop_device *fc,
 		flexcop_ibi_register reg, flexcop_ibi_value val)
 {
 	return flexcop_usb_readwrite_dw(fc, reg, &val.raw, 0);
 }

 static int flexcop_usb_i2c_request(struct flexcop_i2c_adapter *i2c,
 		flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
 {
 	if (op == FC_READ)
 		return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
 				USB_FUNC_I2C_READ, chipaddr, addr, buf, len);
 	else
 		return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
 				USB_FUNC_I2C_WRITE, chipaddr, addr, buf, len);
 }

 static void flexcop_usb_process_frame(struct flexcop_usb *fc_usb,
 	u8 *buffer, int buffer_length)
 {
 	u8 *b;
 	int l;

 	deb_ts("tmp_buffer_length=%d, buffer_length=%d\n",
 		fc_usb->tmp_buffer_length, buffer_length);

 	if (fc_usb->tmp_buffer_length > 0) {
 		memcpy(fc_usb->tmp_buffer+fc_usb->tmp_buffer_length, buffer,
 				buffer_length);
 		fc_usb->tmp_buffer_length += buffer_length;
 		b = fc_usb->tmp_buffer;
 		l = fc_usb->tmp_buffer_length;
 	} else {
 		b=buffer;
 		l=buffer_length;
 	}

 	while (l >= 190) {
 		if (*b == 0xff) {
 			switch (*(b+1) & 0x03) {
 			case 0x01: /* media packet */
 				if (*(b+2) == 0x47)
 					flexcop_pass_dmx_packets(
 							fc_usb->fc_dev, b+2, 1);
 				else
 					deb_ts("not ts packet %*ph\n", 4, b+2);
 				b += 190;
 				l -= 190;
 				break;
 			default:
 				deb_ts("wrong packet type\n");
 				l = 0;
 				break;
 			}
 		} else {
 			deb_ts("wrong header\n");
 			l = 0;
 		}
 	}

 	if (l>0)
 		memcpy(fc_usb->tmp_buffer, b, l);
 	fc_usb->tmp_buffer_length = l;
 }

 static void flexcop_usb_urb_complete(struct urb *urb)
 {
 	struct flexcop_usb *fc_usb = urb->context;
 	int i;

 	if (urb->actual_length > 0)
 		deb_ts("urb completed, bufsize: %d actlen; %d\n",
 			urb->transfer_buffer_length, urb->actual_length);

 	for (i = 0; i < urb->number_of_packets; i++) {
 		if (urb->iso_frame_desc[i].status < 0) {
 			err("iso frame descriptor %d has an error: %d\n", i,
 				urb->iso_frame_desc[i].status);
 		} else
 			if (urb->iso_frame_desc[i].actual_length > 0) {
 				deb_ts("passed %d bytes to the demux\n",
 					urb->iso_frame_desc[i].actual_length);

 				flexcop_usb_process_frame(fc_usb,
 					urb->transfer_buffer +
 						urb->iso_frame_desc[i].offset,
 					urb->iso_frame_desc[i].actual_length);
 			}
 		urb->iso_frame_desc[i].status = 0;
 		urb->iso_frame_desc[i].actual_length = 0;
 	}
 	usb_submit_urb(urb,GFP_ATOMIC);
 }

 static int flexcop_usb_stream_control(struct flexcop_device *fc, int onoff)
 {
 	/* submit/kill iso packets */
 	return 0;
 }

 static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
 {
 	int i;
 	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
 		if (fc_usb->iso_urb[i] != NULL) {
 			deb_ts("unlinking/killing urb no. %d\n",i);
 			usb_kill_urb(fc_usb->iso_urb[i]);
 			usb_free_urb(fc_usb->iso_urb[i]);
 		}

 	if (fc_usb->iso_buffer != NULL)
 		usb_free_coherent(fc_usb->udev,
 			fc_usb->buffer_size, fc_usb->iso_buffer,
 			fc_usb->dma_addr);
 }

 static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
 {
 	u16 frame_size = le16_to_cpu(
 		fc_usb->uintf->cur_altsetting->endpoint[0].desc.wMaxPacketSize);
 	int bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO *
 		frame_size, i, j, ret;
 	int buffer_offset = 0;

 	deb_ts("creating %d iso-urbs with %d frames "
 			"each of %d bytes size = %d.\n", B2C2_USB_NUM_ISO_URB,
 			B2C2_USB_FRAMES_PER_ISO, frame_size, bufsize);

 	fc_usb->iso_buffer = usb_alloc_coherent(fc_usb->udev,
 			bufsize, GFP_KERNEL, &fc_usb->dma_addr);
 	if (fc_usb->iso_buffer == NULL)
 		return -ENOMEM;

 	memset(fc_usb->iso_buffer, 0, bufsize);
 	fc_usb->buffer_size = bufsize;

 	/* creating iso urbs */
 	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
 		fc_usb->iso_urb[i] = usb_alloc_urb(B2C2_USB_FRAMES_PER_ISO,
 			GFP_ATOMIC);
 		if (fc_usb->iso_urb[i] == NULL) {
 			ret = -ENOMEM;
 			goto urb_error;
 		}
 	}

 	/* initialising and submitting iso urbs */
 	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
 		int frame_offset = 0;
 		struct urb *urb = fc_usb->iso_urb[i];
 		deb_ts("initializing and submitting urb no. %d "
 			"(buf_offset: %d).\n", i, buffer_offset);

 		urb->dev = fc_usb->udev;
 		urb->context = fc_usb;
 		urb->complete = flexcop_usb_urb_complete;
 		urb->pipe = B2C2_USB_DATA_PIPE;
 		urb->transfer_flags = URB_ISO_ASAP;
 		urb->interval = 1;
 		urb->number_of_packets = B2C2_USB_FRAMES_PER_ISO;
 		urb->transfer_buffer_length = frame_size * B2C2_USB_FRAMES_PER_ISO;
 		urb->transfer_buffer = fc_usb->iso_buffer + buffer_offset;

 		buffer_offset += frame_size * B2C2_USB_FRAMES_PER_ISO;
 		for (j = 0; j < B2C2_USB_FRAMES_PER_ISO; j++) {
 			deb_ts("urb no: %d, frame: %d, frame_offset: %d\n",
 					i, j, frame_offset);
 			urb->iso_frame_desc[j].offset = frame_offset;
 			urb->iso_frame_desc[j].length = frame_size;
 			frame_offset += frame_size;
 		}

 		if ((ret = usb_submit_urb(fc_usb->iso_urb[i],GFP_ATOMIC))) {
 			err("submitting urb %d failed with %d.", i, ret);
 			goto urb_error;
 		}
 		deb_ts("submitted urb no. %d.\n",i);
 	}

 	/* SRAM */
 	flexcop_sram_set_dest(fc_usb->fc_dev, FC_SRAM_DEST_MEDIA |
 			FC_SRAM_DEST_NET | FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI,
 			FC_SRAM_DEST_TARGET_WAN_USB);
 	flexcop_wan_set_speed(fc_usb->fc_dev, FC_WAN_SPEED_8MBITS);
 	flexcop_sram_ctrl(fc_usb->fc_dev, 1, 1, 1);
 	return 0;

 urb_error:
 	flexcop_usb_transfer_exit(fc_usb);
 	return ret;
 }

 static int flexcop_usb_init(struct flexcop_usb *fc_usb)
 {
 	/* use the alternate setting with the larges buffer */
 	usb_set_interface(fc_usb->udev,0,1);
 	switch (fc_usb->udev->speed) {
 	case USB_SPEED_LOW:
 		err("cannot handle USB speed because it is too slow.");
 		return -ENODEV;
 		break;
 	case USB_SPEED_FULL:
 		info("running at FULL speed.");
 		break;
 	case USB_SPEED_HIGH:
 		info("running at HIGH speed.");
 		break;
 	case USB_SPEED_UNKNOWN: /* fall through */
 	default:
 		err("cannot handle USB speed because it is unknown.");
 		return -ENODEV;
 	}
 	usb_set_intfdata(fc_usb->uintf, fc_usb);
 	return 0;
 }

 static void flexcop_usb_exit(struct flexcop_usb *fc_usb)
 {
 	usb_set_intfdata(fc_usb->uintf, NULL);
 }

 static int flexcop_usb_probe(struct usb_interface *intf,
 		const struct usb_device_id *id)
 {
 	struct usb_device *udev = interface_to_usbdev(intf);
 	struct flexcop_usb *fc_usb = NULL;
 	struct flexcop_device *fc = NULL;
 	int ret;

 	if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) {
 		err("out of memory\n");
 		return -ENOMEM;
 	}

 	/* general flexcop init */
 	fc_usb = fc->bus_specific;
 	fc_usb->fc_dev = fc;

 	fc->read_ibi_reg  = flexcop_usb_read_ibi_reg;
 	fc->write_ibi_reg = flexcop_usb_write_ibi_reg;
 	fc->i2c_request = flexcop_usb_i2c_request;
 	fc->get_mac_addr = flexcop_usb_get_mac_addr;

 	fc->stream_control = flexcop_usb_stream_control;

 	fc->pid_filtering = 1;
 	fc->bus_type = FC_USB;

 	fc->dev = &udev->dev;
 	fc->owner = THIS_MODULE;

 	/* bus specific part */
 	fc_usb->udev = udev;
 	fc_usb->uintf = intf;
 	if ((ret = flexcop_usb_init(fc_usb)) != 0)
 		goto err_kfree;

 	/* init flexcop */
 	if ((ret = flexcop_device_initialize(fc)) != 0)
 		goto err_usb_exit;

 	/* xfer init */
 	if ((ret = flexcop_usb_transfer_init(fc_usb)) != 0)
 		goto err_fc_exit;

 	info("%s successfully initialized and connected.", DRIVER_NAME);
 	return 0;

 err_fc_exit:
 	flexcop_device_exit(fc);
 err_usb_exit:
 	flexcop_usb_exit(fc_usb);
 err_kfree:
 	flexcop_device_kfree(fc);
 	return ret;
 }

 static void flexcop_usb_disconnect(struct usb_interface *intf)
 {
 	struct flexcop_usb *fc_usb = usb_get_intfdata(intf);
 	flexcop_usb_transfer_exit(fc_usb);
 	flexcop_device_exit(fc_usb->fc_dev);
 	flexcop_usb_exit(fc_usb);
 	flexcop_device_kfree(fc_usb->fc_dev);
 	info("%s successfully deinitialized and disconnected.", DRIVER_NAME);
 }

 static struct usb_device_id flexcop_usb_table [] = {
 	{ USB_DEVICE(0x0af7, 0x0101) },
 	{ }
 };
 MODULE_DEVICE_TABLE (usb, flexcop_usb_table);

 /* usb specific object needed to register this driver with the usb subsystem */
 static struct usb_driver flexcop_usb_driver = {
 	.name		= "b2c2_flexcop_usb",
 	.probe		= flexcop_usb_probe,
 	.disconnect = flexcop_usb_disconnect,
 	.id_table	= flexcop_usb_table,
 };

 module_usb_driver(flexcop_usb_driver);

 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_NAME);
 MODULE_LICENSE("GPL");
	/*
	* Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
	* flexcop-usb.c - covers the USB part
	* see flexcop.c for copyright information
	*/
	#define FC_LOG_PREFIX "flexcop_usb"
	#include "flexcop-usb.h"
	#include "flexcop-common.h"

	/* Version information */
	#define DRIVER_VERSION "0.1"
	#define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV USB Driver"
	#define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>"

	/* debug */
	#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
	#define dprintk(level,args...) \
	do { if ((debug & level)) printk(args); } while (0)

	#define debug_dump(b, l, method) do {\
	int i; \
	for (i = 0; i < l; i++) \
	method("%02x ", b[i]); \
	method("\n"); \
	} while (0)

	#define DEBSTATUS ""
	#else
	#define dprintk(level, args...)
	#define debug_dump(b, l, method)
	#define DEBSTATUS " (debugging is not enabled)"
	#endif

	static int debug;
	module_param(debug, int, 0644);
	MODULE_PARM_DESC(debug, "set debugging level (1=info,ts=2,"
	"ctrl=4,i2c=8,v8mem=16 (or-able))." DEBSTATUS);
	#undef DEBSTATUS

	#define deb_info(args...) dprintk(0x01, args)
	#define deb_ts(args...) dprintk(0x02, args)
	#define deb_ctrl(args...) dprintk(0x04, args)
	#define deb_i2c(args...) dprintk(0x08, args)
	#define deb_v8(args...) dprintk(0x10, args)

	/* JLP 111700: we will include the 1 bit gap between the upper and lower 3 bits
	* in the IBI address, to make the V8 code simpler.
	* PCI ADDRESS FORMAT: 0x71C -> 0000 0111 0001 1100 (the six bits used)
	* in general: 0000 0HHH 000L LL00
	* IBI ADDRESS FORMAT: RHHH BLLL
	*
	* where R is the read(1)/write(0) bit, B is the busy bit
	* and HHH and LLL are the two sets of three bits from the PCI address.
	*/
	#define B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(usPCI) (u8) \
	(((usPCI >> 2) & 0x07) + ((usPCI >> 4) & 0x70))
	#define B2C2_FLEX_INTERNALADDR_TO_PCIOFFSET(ucAddr) (u16) \
	(((ucAddr & 0x07) << 2) + ((ucAddr & 0x70) << 4))

	/*
	* DKT 020228
	* - forget about this VENDOR_BUFFER_SIZE, read and write register
	* deal with DWORD or 4 bytes, that should be should from now on
	* - from now on, we don't support anything older than firm 1.00
	* I eliminated the write register as a 2 trip of writing hi word and lo word
	* and force this to write only 4 bytes at a time.
	* NOTE: this should work with all the firmware from 1.00 and newer
	*/
	static int flexcop_usb_readwrite_dw(struct flexcop_device fc, u16 wRegOffsPCI, u32 val, u8 read)
	{
	struct flexcop_usb *fc_usb = fc->bus_specific;
	u8 request = read ? B2C2_USB_READ_REG : B2C2_USB_WRITE_REG;
	u8 request_type = (read ? USB_DIR_IN : USB_DIR_OUT) \| USB_TYPE_VENDOR;
	u8 wAddress = B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(wRegOffsPCI) \|
	(read ? 0x80 : 0);

	int len = usb_control_msg(fc_usb->udev,
	read ? B2C2_USB_CTRL_PIPE_IN : B2C2_USB_CTRL_PIPE_OUT,
	request,
	request_type, /* 0xc0 read or 0x40 write */
	wAddress,
	0,
	val,
	sizeof(u32),
	B2C2_WAIT_FOR_OPERATION_RDW * HZ);

	if (len != sizeof(u32)) {
	err("error while %s dword from %d (%d).", read ? "reading" :
	"writing", wAddress, wRegOffsPCI);
	return -EIO;
	}
	return 0;
	}
	/*
	* DKT 010817 - add support for V8 memory read/write and flash update
	*/
	static int flexcop_usb_v8_memory_req(struct flexcop_usb *fc_usb,
	flexcop_usb_request_t req, u8 page, u16 wAddress,
	u8 *pbBuffer, u32 buflen)
	{
	u8 request_type = USB_TYPE_VENDOR;
	u16 wIndex;
	int nWaitTime, pipe, len;
	wIndex = page << 8;

	switch (req) {
	case B2C2_USB_READ_V8_MEM:
	nWaitTime = B2C2_WAIT_FOR_OPERATION_V8READ;
	request_type \|= USB_DIR_IN;
	pipe = B2C2_USB_CTRL_PIPE_IN;
	break;
	case B2C2_USB_WRITE_V8_MEM:
	wIndex \|= pbBuffer[0];
	request_type \|= USB_DIR_OUT;
	nWaitTime = B2C2_WAIT_FOR_OPERATION_V8WRITE;
	pipe = B2C2_USB_CTRL_PIPE_OUT;
	break;
	case B2C2_USB_FLASH_BLOCK:
	request_type \|= USB_DIR_OUT;
	nWaitTime = B2C2_WAIT_FOR_OPERATION_V8FLASH;
	pipe = B2C2_USB_CTRL_PIPE_OUT;
	break;
	default:
	deb_info("unsupported request for v8_mem_req %x.\n", req);
	return -EINVAL;
	}
	deb_v8("v8mem: %02x %02x %04x %04x, len: %d\n", request_type, req,
	wAddress, wIndex, buflen);

	len = usb_control_msg(fc_usb->udev, pipe,
	req,
	request_type,
	wAddress,
	wIndex,
	pbBuffer,
	buflen,
	nWaitTime * HZ);

	debug_dump(pbBuffer, len, deb_v8);
	return len == buflen ? 0 : -EIO;
	}

	#define bytes_left_to_read_on_page(paddr,buflen) \
	((V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)) > buflen \
	? buflen : (V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)))

	static int flexcop_usb_memory_req(struct flexcop_usb *fc_usb,
	flexcop_usb_request_t req, flexcop_usb_mem_page_t page_start,
	u32 addr, int extended, u8 *buf, u32 len)
	{
	int i,ret = 0;
	u16 wMax;
	u32 pagechunk = 0;

	switch(req) {
	case B2C2_USB_READ_V8_MEM:
	wMax = USB_MEM_READ_MAX;
	break;
	case B2C2_USB_WRITE_V8_MEM:
	wMax = USB_MEM_WRITE_MAX;
	break;
	case B2C2_USB_FLASH_BLOCK:
	wMax = USB_FLASH_MAX;
	break;
	default:
	return -EINVAL;
	break;
	}
	for (i = 0; i < len;) {
	pagechunk =
	wMax < bytes_left_to_read_on_page(addr, len) ?
	wMax :
	bytes_left_to_read_on_page(addr, len);
	deb_info("%x\n",
	(addr & V8_MEMORY_PAGE_MASK) \|
	(V8_MEMORY_EXTENDED*extended));

	ret = flexcop_usb_v8_memory_req(fc_usb, req,
	page_start + (addr / V8_MEMORY_PAGE_SIZE),
	(addr & V8_MEMORY_PAGE_MASK) \|
	(V8_MEMORY_EXTENDED*extended),
	&buf[i], pagechunk);

	if (ret < 0)
	return ret;
	addr += pagechunk;
	len -= pagechunk;
	}
	return 0;
	}

	static int flexcop_usb_get_mac_addr(struct flexcop_device *fc, int extended)
	{
	return flexcop_usb_memory_req(fc->bus_specific, B2C2_USB_READ_V8_MEM,
	V8_MEMORY_PAGE_FLASH, 0x1f010, 1,
	fc->dvb_adapter.proposed_mac, 6);
	}

	#if 0
	static int flexcop_usb_utility_req(struct flexcop_usb *fc_usb, int set,
	flexcop_usb_utility_function_t func, u8 extra, u16 wIndex,
	u16 buflen, u8 *pvBuffer)
	{
	u16 wValue;
	u8 request_type = (set ? USB_DIR_OUT : USB_DIR_IN) \| USB_TYPE_VENDOR;
	int nWaitTime = 2,
	pipe = set ? B2C2_USB_CTRL_PIPE_OUT : B2C2_USB_CTRL_PIPE_IN, len;
	wValue = (func << 8) \| extra;

	len = usb_control_msg(fc_usb->udev,pipe,
	B2C2_USB_UTILITY,
	request_type,
	wValue,
	wIndex,
	pvBuffer,
	buflen,
	nWaitTime * HZ);
	return len == buflen ? 0 : -EIO;
	}
	#endif

	/* usb i2c stuff */
	static int flexcop_usb_i2c_req(struct flexcop_i2c_adapter *i2c,
	flexcop_usb_request_t req, flexcop_usb_i2c_function_t func,
	u8 chipaddr, u8 addr, u8 *buf, u8 buflen)
	{
	struct flexcop_usb *fc_usb = i2c->fc->bus_specific;
	u16 wValue, wIndex;
	int nWaitTime,pipe,len;
	u8 request_type = USB_TYPE_VENDOR;

	switch (func) {
	case USB_FUNC_I2C_WRITE:
	case USB_FUNC_I2C_MULTIWRITE:
	case USB_FUNC_I2C_REPEATWRITE:
	/* DKT 020208 - add this to support special case of DiSEqC */
	case USB_FUNC_I2C_CHECKWRITE:
	pipe = B2C2_USB_CTRL_PIPE_OUT;
	nWaitTime = 2;
	request_type \|= USB_DIR_OUT;
	break;
	case USB_FUNC_I2C_READ:
	case USB_FUNC_I2C_REPEATREAD:
	pipe = B2C2_USB_CTRL_PIPE_IN;
	nWaitTime = 2;
	request_type \|= USB_DIR_IN;
	break;
	default:
	deb_info("unsupported function for i2c_req %x\n", func);
	return -EINVAL;
	}
	wValue = (func << 8) \| (i2c->port << 4);
	wIndex = (chipaddr << 8 ) \| addr;

	deb_i2c("i2c %2d: %02x %02x %02x %02x %02x %02x\n",
	func, request_type, req,
	wValue & 0xff, wValue >> 8,
	wIndex & 0xff, wIndex >> 8);

	len = usb_control_msg(fc_usb->udev,pipe,
	req,
	request_type,
	wValue,
	wIndex,
	buf,
	buflen,
	nWaitTime * HZ);
	return len == buflen ? 0 : -EREMOTEIO;
	}

	/* actual bus specific access functions,
	make sure prototype are/will be equal to pci */
	static flexcop_ibi_value flexcop_usb_read_ibi_reg(struct flexcop_device *fc,
	flexcop_ibi_register reg)
	{
	flexcop_ibi_value val;
	val.raw = 0;
	flexcop_usb_readwrite_dw(fc, reg, &val.raw, 1);
	return val;
	}

	static int flexcop_usb_write_ibi_reg(struct flexcop_device *fc,
	flexcop_ibi_register reg, flexcop_ibi_value val)
	{
	return flexcop_usb_readwrite_dw(fc, reg, &val.raw, 0);
	}

	static int flexcop_usb_i2c_request(struct flexcop_i2c_adapter *i2c,
	flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
	{
	if (op == FC_READ)
	return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
	USB_FUNC_I2C_READ, chipaddr, addr, buf, len);
	else
	return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
	USB_FUNC_I2C_WRITE, chipaddr, addr, buf, len);
	}

	static void flexcop_usb_process_frame(struct flexcop_usb *fc_usb,
	u8 *buffer, int buffer_length)
	{
	u8 *b;
	int l;

	deb_ts("tmp_buffer_length=%d, buffer_length=%d\n",
	fc_usb->tmp_buffer_length, buffer_length);

	if (fc_usb->tmp_buffer_length > 0) {
	memcpy(fc_usb->tmp_buffer+fc_usb->tmp_buffer_length, buffer,
	buffer_length);
	fc_usb->tmp_buffer_length += buffer_length;
	b = fc_usb->tmp_buffer;
	l = fc_usb->tmp_buffer_length;
	} else {
	b=buffer;
	l=buffer_length;
	}

	while (l >= 190) {
	if (*b == 0xff) {
	switch (*(b+1) & 0x03) {
	case 0x01: /* media packet */
	if (*(b+2) == 0x47)
	flexcop_pass_dmx_packets(
	fc_usb->fc_dev, b+2, 1);
	else
	deb_ts("not ts packet %*ph\n", 4, b+2);
	b += 190;
	l -= 190;
	break;
	default:
	deb_ts("wrong packet type\n");
	l = 0;
	break;
	}
	} else {
	deb_ts("wrong header\n");
	l = 0;
	}
	}

	if (l>0)
	memcpy(fc_usb->tmp_buffer, b, l);
	fc_usb->tmp_buffer_length = l;
	}

	static void flexcop_usb_urb_complete(struct urb *urb)
	{
	struct flexcop_usb *fc_usb = urb->context;
	int i;

	if (urb->actual_length > 0)
	deb_ts("urb completed, bufsize: %d actlen; %d\n",
	urb->transfer_buffer_length, urb->actual_length);

	for (i = 0; i < urb->number_of_packets; i++) {
	if (urb->iso_frame_desc[i].status < 0) {
	err("iso frame descriptor %d has an error: %d\n", i,
	urb->iso_frame_desc[i].status);
	} else
	if (urb->iso_frame_desc[i].actual_length > 0) {
	deb_ts("passed %d bytes to the demux\n",
	urb->iso_frame_desc[i].actual_length);

	flexcop_usb_process_frame(fc_usb,
	urb->transfer_buffer +
	urb->iso_frame_desc[i].offset,
	urb->iso_frame_desc[i].actual_length);
	}
	urb->iso_frame_desc[i].status = 0;
	urb->iso_frame_desc[i].actual_length = 0;
	}
	usb_submit_urb(urb,GFP_ATOMIC);
	}

	static int flexcop_usb_stream_control(struct flexcop_device *fc, int onoff)
	{
	/* submit/kill iso packets */
	return 0;
	}

	static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
	{
	int i;
	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
	if (fc_usb->iso_urb[i] != NULL) {
	deb_ts("unlinking/killing urb no. %d\n",i);
	usb_kill_urb(fc_usb->iso_urb[i]);
	usb_free_urb(fc_usb->iso_urb[i]);
	}

	if (fc_usb->iso_buffer != NULL)
	usb_free_coherent(fc_usb->udev,
	fc_usb->buffer_size, fc_usb->iso_buffer,
	fc_usb->dma_addr);
	}

	static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
	{
	u16 frame_size = le16_to_cpu(
	fc_usb->uintf->cur_altsetting->endpoint[0].desc.wMaxPacketSize);
	int bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO *
	frame_size, i, j, ret;
	int buffer_offset = 0;

	deb_ts("creating %d iso-urbs with %d frames "
	"each of %d bytes size = %d.\n", B2C2_USB_NUM_ISO_URB,
	B2C2_USB_FRAMES_PER_ISO, frame_size, bufsize);

	fc_usb->iso_buffer = usb_alloc_coherent(fc_usb->udev,
	bufsize, GFP_KERNEL, &fc_usb->dma_addr);
	if (fc_usb->iso_buffer == NULL)
	return -ENOMEM;

	memset(fc_usb->iso_buffer, 0, bufsize);
	fc_usb->buffer_size = bufsize;

	/* creating iso urbs */
	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
	fc_usb->iso_urb[i] = usb_alloc_urb(B2C2_USB_FRAMES_PER_ISO,
	GFP_ATOMIC);
	if (fc_usb->iso_urb[i] == NULL) {
	ret = -ENOMEM;
	goto urb_error;
	}
	}

	/* initialising and submitting iso urbs */
	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
	int frame_offset = 0;
	struct urb *urb = fc_usb->iso_urb[i];
	deb_ts("initializing and submitting urb no. %d "
	"(buf_offset: %d).\n", i, buffer_offset);

	urb->dev = fc_usb->udev;
	urb->context = fc_usb;
	urb->complete = flexcop_usb_urb_complete;
	urb->pipe = B2C2_USB_DATA_PIPE;
	urb->transfer_flags = URB_ISO_ASAP;
	urb->interval = 1;
	urb->number_of_packets = B2C2_USB_FRAMES_PER_ISO;
	urb->transfer_buffer_length = frame_size * B2C2_USB_FRAMES_PER_ISO;
	urb->transfer_buffer = fc_usb->iso_buffer + buffer_offset;

	buffer_offset += frame_size * B2C2_USB_FRAMES_PER_ISO;
	for (j = 0; j < B2C2_USB_FRAMES_PER_ISO; j++) {
	deb_ts("urb no: %d, frame: %d, frame_offset: %d\n",
	i, j, frame_offset);
	urb->iso_frame_desc[j].offset = frame_offset;
	urb->iso_frame_desc[j].length = frame_size;
	frame_offset += frame_size;
	}

	if ((ret = usb_submit_urb(fc_usb->iso_urb[i],GFP_ATOMIC))) {
	err("submitting urb %d failed with %d.", i, ret);
	goto urb_error;
	}
	deb_ts("submitted urb no. %d.\n",i);
	}

	/* SRAM */
	flexcop_sram_set_dest(fc_usb->fc_dev, FC_SRAM_DEST_MEDIA \|
	FC_SRAM_DEST_NET \| FC_SRAM_DEST_CAO \| FC_SRAM_DEST_CAI,
	FC_SRAM_DEST_TARGET_WAN_USB);
	flexcop_wan_set_speed(fc_usb->fc_dev, FC_WAN_SPEED_8MBITS);
	flexcop_sram_ctrl(fc_usb->fc_dev, 1, 1, 1);
	return 0;

	urb_error:
	flexcop_usb_transfer_exit(fc_usb);
	return ret;
	}

	static int flexcop_usb_init(struct flexcop_usb *fc_usb)
	{
	/* use the alternate setting with the larges buffer */
	usb_set_interface(fc_usb->udev,0,1);
	switch (fc_usb->udev->speed) {
	case USB_SPEED_LOW:
	err("cannot handle USB speed because it is too slow.");
	return -ENODEV;
	break;
	case USB_SPEED_FULL:
	info("running at FULL speed.");
	break;
	case USB_SPEED_HIGH:
	info("running at HIGH speed.");
	break;
	case USB_SPEED_UNKNOWN: /* fall through */
	default:
	err("cannot handle USB speed because it is unknown.");
	return -ENODEV;
	}
	usb_set_intfdata(fc_usb->uintf, fc_usb);
	return 0;
	}

	static void flexcop_usb_exit(struct flexcop_usb *fc_usb)
	{
	usb_set_intfdata(fc_usb->uintf, NULL);
	}

	static int flexcop_usb_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	struct usb_device *udev = interface_to_usbdev(intf);
	struct flexcop_usb *fc_usb = NULL;
	struct flexcop_device *fc = NULL;
	int ret;

	if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) {
	err("out of memory\n");
	return -ENOMEM;
	}

	/* general flexcop init */
	fc_usb = fc->bus_specific;
	fc_usb->fc_dev = fc;

	fc->read_ibi_reg = flexcop_usb_read_ibi_reg;
	fc->write_ibi_reg = flexcop_usb_write_ibi_reg;
	fc->i2c_request = flexcop_usb_i2c_request;
	fc->get_mac_addr = flexcop_usb_get_mac_addr;

	fc->stream_control = flexcop_usb_stream_control;

	fc->pid_filtering = 1;
	fc->bus_type = FC_USB;

	fc->dev = &udev->dev;
	fc->owner = THIS_MODULE;

	/* bus specific part */
	fc_usb->udev = udev;
	fc_usb->uintf = intf;
	if ((ret = flexcop_usb_init(fc_usb)) != 0)
	goto err_kfree;

	/* init flexcop */
	if ((ret = flexcop_device_initialize(fc)) != 0)
	goto err_usb_exit;

	/* xfer init */
	if ((ret = flexcop_usb_transfer_init(fc_usb)) != 0)
	goto err_fc_exit;

	info("%s successfully initialized and connected.", DRIVER_NAME);
	return 0;

	err_fc_exit:
	flexcop_device_exit(fc);
	err_usb_exit:
	flexcop_usb_exit(fc_usb);
	err_kfree:
	flexcop_device_kfree(fc);
	return ret;
	}

	static void flexcop_usb_disconnect(struct usb_interface *intf)
	{
	struct flexcop_usb *fc_usb = usb_get_intfdata(intf);
	flexcop_usb_transfer_exit(fc_usb);
	flexcop_device_exit(fc_usb->fc_dev);
	flexcop_usb_exit(fc_usb);
	flexcop_device_kfree(fc_usb->fc_dev);
	info("%s successfully deinitialized and disconnected.", DRIVER_NAME);
	}

	static struct usb_device_id flexcop_usb_table [] = {
	{ USB_DEVICE(0x0af7, 0x0101) },
	{ }
	};
	MODULE_DEVICE_TABLE (usb, flexcop_usb_table);

	/* usb specific object needed to register this driver with the usb subsystem */
	static struct usb_driver flexcop_usb_driver = {
	.name = "b2c2_flexcop_usb",
	.probe = flexcop_usb_probe,
	.disconnect = flexcop_usb_disconnect,
	.id_table = flexcop_usb_table,
	};

	module_usb_driver(flexcop_usb_driver);

	MODULE_AUTHOR(DRIVER_AUTHOR);
	MODULE_DESCRIPTION(DRIVER_NAME);
	MODULE_LICENSE("GPL");